/*
 * Copyright 2007-2009 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package net.paoding.rose.web.var;

import java.util.Enumeration;

import javax.servlet.http.HttpSession;

/**
 * 
 * @author qieqie.wang@paoding.net
 * 
 */
public class SessionHelper {
	SessionHelper() {
	}

	public HttpSession innerSession() {
		return PrivateVar.session();
	}

	public HttpSession innerSession(boolean create) {
		return PrivateVar.session(create);
	}

	public boolean isNull() {
		return innerSession(false) == null;
	}

	public void attr(String name, Object value) {
		setAttribute(name, value);
	}

	public void setAttribute(String name, Object value) {
		innerSession().setAttribute(name, value);
	}

	public Object attr(String name) {
		return getAttribute(name);
	}

	public Object getAttribute(String name) {
		return innerSession().getAttribute(name);
	}

	public void remoteAttr(String name) {
		innerSession().removeAttribute(name);
	}

	public Enumeration<String> attrNames() {
		return getAttributeNames();
	}

	@SuppressWarnings("unchecked")
	public Enumeration<String> getAttributeNames() {
		return innerSession().getAttributeNames();
	}
}
